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RedHat Enterprise Linux 7: RHSA-2015-2172-01 Important: Local Attack

red hat
Calendar Grey November 19, 2015
Scroller Redhat
A critical security update for Red Hat Enterprise's Glibc addresses significant vulnerabilities related to local attack vectors, with essential patches now deployed.
Updated glibc packages that fix one security issue are now available for Red Hat Enterprise Linux 7

Solution

Before applying this update, make sure all previously released errata relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

Summary

The glibc packages provide the standard C libraries (libc), POSIX thread libraries (libpthread), standard math libraries (libm), and the Name Server Caching Daemon (nscd) used by multiple programs on the system. Without these libraries, the Linux system cannot function correctly.
It was discovered that the nss_files backend for the Name Service Switch in glibc would return incorrect data to applications or corrupt the heap (depending on adjacent heap contents) in certain cases. A local attacker could potentially use this flaw to escalate their privileges. (CVE-2015-5277)
This issue was discovered by Sumit Bose and Lukáš Slebodník of Red Hat.
All glibc users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue.

Topics%20covered

Topics Covered

security advisory security issue privilege escalation local attack Red Hat Enterprise glibc update important severity

References

https://access.redhat.com/security/cve/CVE-2015-5277 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: glibc-2.17-106.el7_2.1.src.rpm
x86_64: glibc-2.17-106.el7_2.1.i686.rpm glibc-2.17-106.el7_2.1.x86_64.rpm glibc-common-2.17-106.el7_2.1.x86_64.rpm glibc-debuginfo-2.17-106.el7_2.1.i686.rpm glibc-debuginfo-2.17-106.el7_2.1.x86_64.rpm glibc-debuginfo-common-2.17-106.el7_2.1.i686.rpm glibc-debuginfo-common-2.17-106.el7_2.1.x86_64.rpm glibc-devel-2.17-106.el7_2.1.i686.rpm glibc-devel-2.17-106.el7_2.1.x86_64.rpm glibc-headers-2.17-106.el7_2.1.x86_64.rpm glibc-utils-2.17-106.el7_2.1.x86_64.rpm nscd-2.17-106.el7_2.1.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
x86_64: glibc-debuginfo-2.17-106.el7_2.1.i686.rpm glibc-debuginfo-2.17-106.el7_2.1.x86_64.rpm glibc-debuginfo-common-2.17-106.el7_2.1.i686.rpm glibc-debuginfo-common-2.17-106.el7_2.1.x86_64.rpm glibc-static-2.17-106.el7_2.1.i686.rpm glibc-static-2.17-106.el7_2.1.x86_64.rpm
Red Hat Enterprise Linux ComputeNode (v. 7):
Source: glibc-2.17-106.el7_2.1.src.rpm
x86_64: glibc-2.17-106.el7_2.1.i686.rpm glibc-2.17-106.el7_2.1.x86_64.rpm glibc-common-2.17-106.el7_2.1.x86_64.rpm glibc-debuginfo-2.17-106.el7_2.1.i686.rpm glibc-debuginfo-2.17-106.el7_2.1.x86_64.rpm glibc-debuginfo-common-2.17-106.el7_2.1.i686.rpm glibc-debuginfo-common-2.17-106.el7_2.1.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2015:2172-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2015:2172.html
Issue date: 2015-11-19

Topic

Updated glibc packages that fix one security issue are now available forRed Hat Enterprise Linux 7.Red Hat Product Security has rated this update as having Important securityimpact. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available from the CVE link in theReferences section.

Topics%20covered

Topics Covered

security advisory security issue privilege escalation local attack Red Hat Enterprise glibc update important severity

Relevant Releases Architectures

Red Hat Enterprise Linux Client (v. 7) - x86_64

Red Hat Enterprise Linux Client Optional (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64

Red Hat Enterprise Linux Server (v. 7) - aarch64, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 7) - aarch64, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Workstation (v. 7) - x86_64

Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64

Bugs Fixed

1262914 - CVE-2015-5277 glibc: data corruption while reading the NSS files database

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